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A163586 Prime helix with extended Ulam spirals, with primes at the center. Each of these is the center of its extended Ulam spiral until it bifurcates into the next twin prime on the main diagonal with 4n^2-2n+p +0
1
3, 5, 17, 29, 41, 71, 101, 191 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A161682 A079373 A038703 this_sequence A074931 A023226 A113169

Adjacent sequences: A163583 A163584 A163585 this_sequence A163587 A163588 A163589

KEYWORD

nonn,uned

AUTHOR

Milton L. Brown (miltbrown(AT)earthlink.net), Jul 31 2009

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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